iscsi-target: Add iSCSI fabric support for target v4.1

The Linux-iSCSI.org target module is a full featured in-kernel
software implementation of iSCSI target mode (RFC-3720) for the
current WIP mainline target v4.1 infrastructure code for the v3.1
kernel.  More information can be found here:

http://linux-iscsi.org/wiki/ISCSI

This includes support for:

   * RFC-3720 defined request / response state machines and support for
     all defined iSCSI operation codes from Section 10.2.1.2 using libiscsi
     include/scsi/iscsi_proto.h PDU definitions
   * Target v4.1 compatible control plane using the generic layout in
     target_core_fabric_configfs.c and fabric dependent attributes
     within /sys/kernel/config/target/iscsi/ subdirectories.
   * Target v4.1 compatible iSCSI statistics based on RFC-4544 (iSCSI MIBS)
   * Support for IPv6 and IPv4 network portals in M:N mapping to TPGs
   * iSCSI Error Recovery Hierarchy support
   * Per iSCSI connection RX/TX thread pair scheduling affinity
   * crc32c + crc32c_intel SSEv4 instruction offload support using libcrypto
   * CHAP Authentication support using libcrypto
   * Conversion to use internal SGl allocation with iscsit_alloc_buffs() ->
     transport_generic_map_mem_to_cmd()

(nab: Fix iscsi_proto.h struct scsi_lun usage from linux-next in commit:
      iscsi: Use struct scsi_lun in iscsi structs instead of u8[8])
(nab: Fix 32-bit compile warnings)

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Andy Grover <agrover@redhat.com>
Acked-by: Roland Dreier <roland@kernel.org>
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>

1 files changed, 1882 insertions, 0 deletions

diff --git a/drivers/target/iscsi/iscsi_target_configfs.c b/drivers/target/iscsi/iscsi_target_configfs.c
new file mode 100644
index 00000000000..32bb92c4445
--- /dev/null
+++ b/drivers/target/iscsi/iscsi_target_configfs.c
@@ -0,0 +1,1882 @@
+/*******************************************************************************
+ * This file contains the configfs implementation for iSCSI Target mode
+ * from the LIO-Target Project.
+ *
+ * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
+ *
+ * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
+ *
+ * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ ****************************************************************************/
+
+#include <linux/configfs.h>
+#include <target/target_core_base.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_fabric_ops.h>
+#include <target/target_core_fabric_configfs.h>
+#include <target/target_core_fabric_lib.h>
+#include <target/target_core_device.h>
+#include <target/target_core_tpg.h>
+#include <target/target_core_configfs.h>
+#include <target/configfs_macros.h>
+
+#include "iscsi_target_core.h"
+#include "iscsi_target_parameters.h"
+#include "iscsi_target_device.h"
+#include "iscsi_target_erl0.h"
+#include "iscsi_target_nodeattrib.h"
+#include "iscsi_target_tpg.h"
+#include "iscsi_target_util.h"
+#include "iscsi_target.h"
+#include "iscsi_target_stat.h"
+#include "iscsi_target_configfs.h"
+
+struct target_fabric_configfs *lio_target_fabric_configfs;
+
+struct lio_target_configfs_attribute {
+	struct configfs_attribute attr;
+	ssize_t (*show)(void *, char *);
+	ssize_t (*store)(void *, const char *, size_t);
+};
+
+struct iscsi_portal_group *lio_get_tpg_from_tpg_item(
+	struct config_item *item,
+	struct iscsi_tiqn **tiqn_out)
+{
+	struct se_portal_group *se_tpg = container_of(to_config_group(item),
+					struct se_portal_group, tpg_group);
+	struct iscsi_portal_group *tpg =
+			(struct iscsi_portal_group *)se_tpg->se_tpg_fabric_ptr;
+	int ret;
+
+	if (!tpg) {
+		pr_err("Unable to locate struct iscsi_portal_group "
+			"pointer\n");
+		return NULL;
+	}
+	ret = iscsit_get_tpg(tpg);
+	if (ret < 0)
+		return NULL;
+
+	*tiqn_out = tpg->tpg_tiqn;
+	return tpg;
+}
+
+/* Start items for lio_target_portal_cit */
+
+static ssize_t lio_target_np_show_sctp(
+	struct se_tpg_np *se_tpg_np,
+	char *page)
+{
+	struct iscsi_tpg_np *tpg_np = container_of(se_tpg_np,
+				struct iscsi_tpg_np, se_tpg_np);
+	struct iscsi_tpg_np *tpg_np_sctp;
+	ssize_t rb;
+
+	tpg_np_sctp = iscsit_tpg_locate_child_np(tpg_np, ISCSI_SCTP_TCP);
+	if (tpg_np_sctp)
+		rb = sprintf(page, "1\n");
+	else
+		rb = sprintf(page, "0\n");
+
+	return rb;
+}
+
+static ssize_t lio_target_np_store_sctp(
+	struct se_tpg_np *se_tpg_np,
+	const char *page,
+	size_t count)
+{
+	struct iscsi_np *np;
+	struct iscsi_portal_group *tpg;
+	struct iscsi_tpg_np *tpg_np = container_of(se_tpg_np,
+				struct iscsi_tpg_np, se_tpg_np);
+	struct iscsi_tpg_np *tpg_np_sctp = NULL;
+	char *endptr;
+	u32 op;
+	int ret;
+
+	op = simple_strtoul(page, &endptr, 0);
+	if ((op != 1) && (op != 0)) {
+		pr_err("Illegal value for tpg_enable: %u\n", op);
+		return -EINVAL;
+	}
+	np = tpg_np->tpg_np;
+	if (!np) {
+		pr_err("Unable to locate struct iscsi_np from"
+				" struct iscsi_tpg_np\n");
+		return -EINVAL;
+	}
+
+	tpg = tpg_np->tpg;
+	if (iscsit_get_tpg(tpg) < 0)
+		return -EINVAL;
+
+	if (op) {
+		/*
+		 * Use existing np->np_sockaddr for SCTP network portal reference
+		 */
+		tpg_np_sctp = iscsit_tpg_add_network_portal(tpg, &np->np_sockaddr,
+					np->np_ip, tpg_np, ISCSI_SCTP_TCP);
+		if (!tpg_np_sctp || IS_ERR(tpg_np_sctp))
+			goto out;
+	} else {
+		tpg_np_sctp = iscsit_tpg_locate_child_np(tpg_np, ISCSI_SCTP_TCP);
+		if (!tpg_np_sctp)
+			goto out;
+
+		ret = iscsit_tpg_del_network_portal(tpg, tpg_np_sctp);
+		if (ret < 0)
+			goto out;
+	}
+
+	iscsit_put_tpg(tpg);
+	return count;
+out:
+	iscsit_put_tpg(tpg);
+	return -EINVAL;
+}
+
+TF_NP_BASE_ATTR(lio_target, sctp, S_IRUGO | S_IWUSR);
+
+static struct configfs_attribute *lio_target_portal_attrs[] = {
+	&lio_target_np_sctp.attr,
+	NULL,
+};
+
+/* Stop items for lio_target_portal_cit */
+
+/* Start items for lio_target_np_cit */
+
+#define MAX_PORTAL_LEN		256
+
+struct se_tpg_np *lio_target_call_addnptotpg(
+	struct se_portal_group *se_tpg,
+	struct config_group *group,
+	const char *name)
+{
+	struct iscsi_portal_group *tpg;
+	struct iscsi_tpg_np *tpg_np;
+	char *str, *str2, *ip_str, *port_str;
+	struct __kernel_sockaddr_storage sockaddr;
+	struct sockaddr_in *sock_in;
+	struct sockaddr_in6 *sock_in6;
+	unsigned long port;
+	int ret;
+	char buf[MAX_PORTAL_LEN + 1];
+
+	if (strlen(name) > MAX_PORTAL_LEN) {
+		pr_err("strlen(name): %d exceeds MAX_PORTAL_LEN: %d\n",
+			(int)strlen(name), MAX_PORTAL_LEN);
+		return ERR_PTR(-EOVERFLOW);
+	}
+	memset(buf, 0, MAX_PORTAL_LEN + 1);
+	snprintf(buf, MAX_PORTAL_LEN, "%s", name);
+
+	memset(&sockaddr, 0, sizeof(struct __kernel_sockaddr_storage));
+
+	str = strstr(buf, "[");
+	if (str) {
+		const char *end;
+
+		str2 = strstr(str, "]");
+		if (!str2) {
+			pr_err("Unable to locate trailing \"]\""
+				" in IPv6 iSCSI network portal address\n");
+			return ERR_PTR(-EINVAL);
+		}
+		str++; /* Skip over leading "[" */
+		*str2 = '\0'; /* Terminate the IPv6 address */
+		str2++; /* Skip over the "]" */
+		port_str = strstr(str2, ":");
+		if (!port_str) {
+			pr_err("Unable to locate \":port\""
+				" in IPv6 iSCSI network portal address\n");
+			return ERR_PTR(-EINVAL);
+		}
+		*port_str = '\0'; /* Terminate string for IP */
+		port_str++; /* Skip over ":" */
+
+		ret = strict_strtoul(port_str, 0, &port);
+		if (ret < 0) {
+			pr_err("strict_strtoul() failed for port_str: %d\n", ret);
+			return ERR_PTR(ret);
+		}
+		sock_in6 = (struct sockaddr_in6 *)&sockaddr;
+		sock_in6->sin6_family = AF_INET6;
+		sock_in6->sin6_port = htons((unsigned short)port);
+		ret = in6_pton(str, IPV6_ADDRESS_SPACE,
+				(void *)&sock_in6->sin6_addr.in6_u, -1, &end);
+		if (ret <= 0) {
+			pr_err("in6_pton returned: %d\n", ret);
+			return ERR_PTR(-EINVAL);
+		}
+	} else {
+		str = ip_str = &buf[0];
+		port_str = strstr(ip_str, ":");
+		if (!port_str) {
+			pr_err("Unable to locate \":port\""
+				" in IPv4 iSCSI network portal address\n");
+			return ERR_PTR(-EINVAL);
+		}
+		*port_str = '\0'; /* Terminate string for IP */
+		port_str++; /* Skip over ":" */
+
+		ret = strict_strtoul(port_str, 0, &port);
+		if (ret < 0) {
+			pr_err("strict_strtoul() failed for port_str: %d\n", ret);
+			return ERR_PTR(ret);
+		}
+		sock_in = (struct sockaddr_in *)&sockaddr;
+		sock_in->sin_family = AF_INET;
+		sock_in->sin_port = htons((unsigned short)port);
+		sock_in->sin_addr.s_addr = in_aton(ip_str);
+	}
+	tpg = container_of(se_tpg, struct iscsi_portal_group, tpg_se_tpg);
+	ret = iscsit_get_tpg(tpg);
+	if (ret < 0)
+		return ERR_PTR(-EINVAL);
+
+	pr_debug("LIO_Target_ConfigFS: REGISTER -> %s TPGT: %hu"
+		" PORTAL: %s\n",
+		config_item_name(&se_tpg->se_tpg_wwn->wwn_group.cg_item),
+		tpg->tpgt, name);
+	/*
+	 * Assume ISCSI_TCP by default.  Other network portals for other
+	 * iSCSI fabrics:
+	 *
+	 * Traditional iSCSI over SCTP (initial support)
+	 * iSER/TCP (TODO, hardware available)
+	 * iSER/SCTP (TODO, software emulation with osc-iwarp)
+	 * iSER/IB (TODO, hardware available)
+	 *
+	 * can be enabled with atributes under
+	 * sys/kernel/config/iscsi/$IQN/$TPG/np/$IP:$PORT/
+	 *
+	 */
+	tpg_np = iscsit_tpg_add_network_portal(tpg, &sockaddr, str, NULL,
+				ISCSI_TCP);
+	if (IS_ERR(tpg_np)) {
+		iscsit_put_tpg(tpg);
+		return ERR_PTR(PTR_ERR(tpg_np));
+	}
+	pr_debug("LIO_Target_ConfigFS: addnptotpg done!\n");
+
+	iscsit_put_tpg(tpg);
+	return &tpg_np->se_tpg_np;
+}
+
+static void lio_target_call_delnpfromtpg(
+	struct se_tpg_np *se_tpg_np)
+{
+	struct iscsi_portal_group *tpg;
+	struct iscsi_tpg_np *tpg_np;
+	struct se_portal_group *se_tpg;
+	int ret;
+
+	tpg_np = container_of(se_tpg_np, struct iscsi_tpg_np, se_tpg_np);
+	tpg = tpg_np->tpg;
+	ret = iscsit_get_tpg(tpg);
+	if (ret < 0)
+		return;
+
+	se_tpg = &tpg->tpg_se_tpg;
+	pr_debug("LIO_Target_ConfigFS: DEREGISTER -> %s TPGT: %hu"
+		" PORTAL: %s:%hu\n", config_item_name(&se_tpg->se_tpg_wwn->wwn_group.cg_item),
+		tpg->tpgt, tpg_np->tpg_np->np_ip, tpg_np->tpg_np->np_port);
+
+	ret = iscsit_tpg_del_network_portal(tpg, tpg_np);
+	if (ret < 0)
+		goto out;
+
+	pr_debug("LIO_Target_ConfigFS: delnpfromtpg done!\n");
+out:
+	iscsit_put_tpg(tpg);
+}
+
+/* End items for lio_target_np_cit */
+
+/* Start items for lio_target_nacl_attrib_cit */
+
+#define DEF_NACL_ATTRIB(name)						\
+static ssize_t iscsi_nacl_attrib_show_##name(				\
+	struct se_node_acl *se_nacl,					\
+	char *page)							\
+{									\
+	struct iscsi_node_acl *nacl = container_of(se_nacl, struct iscsi_node_acl, \
+					se_node_acl);			\
+									\
+	return sprintf(page, "%u\n", ISCSI_NODE_ATTRIB(nacl)->name);	\
+}									\
+									\
+static ssize_t iscsi_nacl_attrib_store_##name(				\
+	struct se_node_acl *se_nacl,					\
+	const char *page,						\
+	size_t count)							\
+{									\
+	struct iscsi_node_acl *nacl = container_of(se_nacl, struct iscsi_node_acl, \
+					se_node_acl);			\
+	char *endptr;							\
+	u32 val;							\
+	int ret;							\
+									\
+	val = simple_strtoul(page, &endptr, 0);				\
+	ret = iscsit_na_##name(nacl, val);				\
+	if (ret < 0)							\
+		return ret;						\
+									\
+	return count;							\
+}
+
+#define NACL_ATTR(_name, _mode) TF_NACL_ATTRIB_ATTR(iscsi, _name, _mode);
+/*
+ * Define iscsi_node_attrib_s_dataout_timeout
+ */
+DEF_NACL_ATTRIB(dataout_timeout);
+NACL_ATTR(dataout_timeout, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_node_attrib_s_dataout_timeout_retries
+ */
+DEF_NACL_ATTRIB(dataout_timeout_retries);
+NACL_ATTR(dataout_timeout_retries, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_node_attrib_s_default_erl
+ */
+DEF_NACL_ATTRIB(default_erl);
+NACL_ATTR(default_erl, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_node_attrib_s_nopin_timeout
+ */
+DEF_NACL_ATTRIB(nopin_timeout);
+NACL_ATTR(nopin_timeout, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_node_attrib_s_nopin_response_timeout
+ */
+DEF_NACL_ATTRIB(nopin_response_timeout);
+NACL_ATTR(nopin_response_timeout, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_node_attrib_s_random_datain_pdu_offsets
+ */
+DEF_NACL_ATTRIB(random_datain_pdu_offsets);
+NACL_ATTR(random_datain_pdu_offsets, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_node_attrib_s_random_datain_seq_offsets
+ */
+DEF_NACL_ATTRIB(random_datain_seq_offsets);
+NACL_ATTR(random_datain_seq_offsets, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_node_attrib_s_random_r2t_offsets
+ */
+DEF_NACL_ATTRIB(random_r2t_offsets);
+NACL_ATTR(random_r2t_offsets, S_IRUGO | S_IWUSR);
+
+static struct configfs_attribute *lio_target_nacl_attrib_attrs[] = {
+	&iscsi_nacl_attrib_dataout_timeout.attr,
+	&iscsi_nacl_attrib_dataout_timeout_retries.attr,
+	&iscsi_nacl_attrib_default_erl.attr,
+	&iscsi_nacl_attrib_nopin_timeout.attr,
+	&iscsi_nacl_attrib_nopin_response_timeout.attr,
+	&iscsi_nacl_attrib_random_datain_pdu_offsets.attr,
+	&iscsi_nacl_attrib_random_datain_seq_offsets.attr,
+	&iscsi_nacl_attrib_random_r2t_offsets.attr,
+	NULL,
+};
+
+/* End items for lio_target_nacl_attrib_cit */
+
+/* Start items for lio_target_nacl_auth_cit */
+
+#define __DEF_NACL_AUTH_STR(prefix, name, flags)			\
+static ssize_t __iscsi_##prefix##_show_##name(				\
+	struct iscsi_node_acl *nacl,					\
+	char *page)							\
+{									\
+	struct iscsi_node_auth *auth = &nacl->node_auth;		\
+									\
+	if (!capable(CAP_SYS_ADMIN))					\
+		return -EPERM;						\
+	return snprintf(page, PAGE_SIZE, "%s\n", auth->name);		\
+}									\
+									\
+static ssize_t __iscsi_##prefix##_store_##name(				\
+	struct iscsi_node_acl *nacl,					\
+	const char *page,						\
+	size_t count)							\
+{									\
+	struct iscsi_node_auth *auth = &nacl->node_auth;		\
+									\
+	if (!capable(CAP_SYS_ADMIN))					\
+		return -EPERM;						\
+									\
+	snprintf(auth->name, PAGE_SIZE, "%s", page);			\
+	if (!strncmp("NULL", auth->name, 4))				\
+		auth->naf_flags &= ~flags;				\
+	else								\
+		auth->naf_flags |= flags;				\
+									\
+	if ((auth->naf_flags & NAF_USERID_IN_SET) &&			\
+	    (auth->naf_flags & NAF_PASSWORD_IN_SET))			\
+		auth->authenticate_target = 1;				\
+	else								\
+		auth->authenticate_target = 0;				\
+									\
+	return count;							\
+}
+
+#define __DEF_NACL_AUTH_INT(prefix, name)				\
+static ssize_t __iscsi_##prefix##_show_##name(				\
+	struct iscsi_node_acl *nacl,					\
+	char *page)							\
+{									\
+	struct iscsi_node_auth *auth = &nacl->node_auth;		\
+									\
+	if (!capable(CAP_SYS_ADMIN))					\
+		return -EPERM;						\
+									\
+	return snprintf(page, PAGE_SIZE, "%d\n", auth->name);		\
+}
+
+#define DEF_NACL_AUTH_STR(name, flags)					\
+	__DEF_NACL_AUTH_STR(nacl_auth, name, flags)			\
+static ssize_t iscsi_nacl_auth_show_##name(				\
+	struct se_node_acl *nacl,					\
+	char *page)							\
+{									\
+	return __iscsi_nacl_auth_show_##name(container_of(nacl,		\
+			struct iscsi_node_acl, se_node_acl), page);		\
+}									\
+static ssize_t iscsi_nacl_auth_store_##name(				\
+	struct se_node_acl *nacl,					\
+	const char *page,						\
+	size_t count)							\
+{									\
+	return __iscsi_nacl_auth_store_##name(container_of(nacl,	\
+			struct iscsi_node_acl, se_node_acl), page, count);	\
+}
+
+#define DEF_NACL_AUTH_INT(name)						\
+	__DEF_NACL_AUTH_INT(nacl_auth, name)				\
+static ssize_t iscsi_nacl_auth_show_##name(				\
+	struct se_node_acl *nacl,					\
+	char *page)							\
+{									\
+	return __iscsi_nacl_auth_show_##name(container_of(nacl,		\
+			struct iscsi_node_acl, se_node_acl), page);		\
+}
+
+#define AUTH_ATTR(_name, _mode)	TF_NACL_AUTH_ATTR(iscsi, _name, _mode);
+#define AUTH_ATTR_RO(_name) TF_NACL_AUTH_ATTR_RO(iscsi, _name);
+
+/*
+ * One-way authentication userid
+ */
+DEF_NACL_AUTH_STR(userid, NAF_USERID_SET);
+AUTH_ATTR(userid, S_IRUGO | S_IWUSR);
+/*
+ * One-way authentication password
+ */
+DEF_NACL_AUTH_STR(password, NAF_PASSWORD_SET);
+AUTH_ATTR(password, S_IRUGO | S_IWUSR);
+/*
+ * Enforce mutual authentication
+ */
+DEF_NACL_AUTH_INT(authenticate_target);
+AUTH_ATTR_RO(authenticate_target);
+/*
+ * Mutual authentication userid
+ */
+DEF_NACL_AUTH_STR(userid_mutual, NAF_USERID_IN_SET);
+AUTH_ATTR(userid_mutual, S_IRUGO | S_IWUSR);
+/*
+ * Mutual authentication password
+ */
+DEF_NACL_AUTH_STR(password_mutual, NAF_PASSWORD_IN_SET);
+AUTH_ATTR(password_mutual, S_IRUGO | S_IWUSR);
+
+static struct configfs_attribute *lio_target_nacl_auth_attrs[] = {
+	&iscsi_nacl_auth_userid.attr,
+	&iscsi_nacl_auth_password.attr,
+	&iscsi_nacl_auth_authenticate_target.attr,
+	&iscsi_nacl_auth_userid_mutual.attr,
+	&iscsi_nacl_auth_password_mutual.attr,
+	NULL,
+};
+
+/* End items for lio_target_nacl_auth_cit */
+
+/* Start items for lio_target_nacl_param_cit */
+
+#define DEF_NACL_PARAM(name)						\
+static ssize_t iscsi_nacl_param_show_##name(				\
+	struct se_node_acl *se_nacl,					\
+	char *page)							\
+{									\
+	struct iscsi_session *sess;					\
+	struct se_session *se_sess;					\
+	ssize_t rb;							\
+									\
+	spin_lock_bh(&se_nacl->nacl_sess_lock);				\
+	se_sess = se_nacl->nacl_sess;					\
+	if (!se_sess) {							\
+		rb = snprintf(page, PAGE_SIZE,				\
+			"No Active iSCSI Session\n");			\
+	} else {							\
+		sess = se_sess->fabric_sess_ptr;			\
+		rb = snprintf(page, PAGE_SIZE, "%u\n",			\
+			(u32)sess->sess_ops->name);			\
+	}								\
+	spin_unlock_bh(&se_nacl->nacl_sess_lock);			\
+									\
+	return rb;							\
+}
+
+#define NACL_PARAM_ATTR(_name) TF_NACL_PARAM_ATTR_RO(iscsi, _name);
+
+DEF_NACL_PARAM(MaxConnections);
+NACL_PARAM_ATTR(MaxConnections);
+
+DEF_NACL_PARAM(InitialR2T);
+NACL_PARAM_ATTR(InitialR2T);
+
+DEF_NACL_PARAM(ImmediateData);
+NACL_PARAM_ATTR(ImmediateData);
+
+DEF_NACL_PARAM(MaxBurstLength);
+NACL_PARAM_ATTR(MaxBurstLength);
+
+DEF_NACL_PARAM(FirstBurstLength);
+NACL_PARAM_ATTR(FirstBurstLength);
+
+DEF_NACL_PARAM(DefaultTime2Wait);
+NACL_PARAM_ATTR(DefaultTime2Wait);
+
+DEF_NACL_PARAM(DefaultTime2Retain);
+NACL_PARAM_ATTR(DefaultTime2Retain);
+
+DEF_NACL_PARAM(MaxOutstandingR2T);
+NACL_PARAM_ATTR(MaxOutstandingR2T);
+
+DEF_NACL_PARAM(DataPDUInOrder);
+NACL_PARAM_ATTR(DataPDUInOrder);
+
+DEF_NACL_PARAM(DataSequenceInOrder);
+NACL_PARAM_ATTR(DataSequenceInOrder);
+
+DEF_NACL_PARAM(ErrorRecoveryLevel);
+NACL_PARAM_ATTR(ErrorRecoveryLevel);
+
+static struct configfs_attribute *lio_target_nacl_param_attrs[] = {
+	&iscsi_nacl_param_MaxConnections.attr,
+	&iscsi_nacl_param_InitialR2T.attr,
+	&iscsi_nacl_param_ImmediateData.attr,
+	&iscsi_nacl_param_MaxBurstLength.attr,
+	&iscsi_nacl_param_FirstBurstLength.attr,
+	&iscsi_nacl_param_DefaultTime2Wait.attr,
+	&iscsi_nacl_param_DefaultTime2Retain.attr,
+	&iscsi_nacl_param_MaxOutstandingR2T.attr,
+	&iscsi_nacl_param_DataPDUInOrder.attr,
+	&iscsi_nacl_param_DataSequenceInOrder.attr,
+	&iscsi_nacl_param_ErrorRecoveryLevel.attr,
+	NULL,
+};
+
+/* End items for lio_target_nacl_param_cit */
+
+/* Start items for lio_target_acl_cit */
+
+static ssize_t lio_target_nacl_show_info(
+	struct se_node_acl *se_nacl,
+	char *page)
+{
+	struct iscsi_session *sess;
+	struct iscsi_conn *conn;
+	struct se_session *se_sess;
+	ssize_t rb = 0;
+
+	spin_lock_bh(&se_nacl->nacl_sess_lock);
+	se_sess = se_nacl->nacl_sess;
+	if (!se_sess) {
+		rb += sprintf(page+rb, "No active iSCSI Session for Initiator"
+			" Endpoint: %s\n", se_nacl->initiatorname);
+	} else {
+		sess = se_sess->fabric_sess_ptr;
+
+		if (sess->sess_ops->InitiatorName)
+			rb += sprintf(page+rb, "InitiatorName: %s\n",
+				sess->sess_ops->InitiatorName);
+		if (sess->sess_ops->InitiatorAlias)
+			rb += sprintf(page+rb, "InitiatorAlias: %s\n",
+				sess->sess_ops->InitiatorAlias);
+
+		rb += sprintf(page+rb, "LIO Session ID: %u   "
+			"ISID: 0x%02x %02x %02x %02x %02x %02x  "
+			"TSIH: %hu  ", sess->sid,
+			sess->isid[0], sess->isid[1], sess->isid[2],
+			sess->isid[3], sess->isid[4], sess->isid[5],
+			sess->tsih);
+		rb += sprintf(page+rb, "SessionType: %s\n",
+				(sess->sess_ops->SessionType) ?
+				"Discovery" : "Normal");
+		rb += sprintf(page+rb, "Session State: ");
+		switch (sess->session_state) {
+		case TARG_SESS_STATE_FREE:
+			rb += sprintf(page+rb, "TARG_SESS_FREE\n");
+			break;
+		case TARG_SESS_STATE_ACTIVE:
+			rb += sprintf(page+rb, "TARG_SESS_STATE_ACTIVE\n");
+			break;
+		case TARG_SESS_STATE_LOGGED_IN:
+			rb += sprintf(page+rb, "TARG_SESS_STATE_LOGGED_IN\n");
+			break;
+		case TARG_SESS_STATE_FAILED:
+			rb += sprintf(page+rb, "TARG_SESS_STATE_FAILED\n");
+			break;
+		case TARG_SESS_STATE_IN_CONTINUE:
+			rb += sprintf(page+rb, "TARG_SESS_STATE_IN_CONTINUE\n");
+			break;
+		default:
+			rb += sprintf(page+rb, "ERROR: Unknown Session"
+					" State!\n");
+			break;
+		}
+
+		rb += sprintf(page+rb, "---------------------[iSCSI Session"
+				" Values]-----------------------\n");
+		rb += sprintf(page+rb, "  CmdSN/WR  :  CmdSN/WC  :  ExpCmdSN"
+				"  :  MaxCmdSN  :     ITT    :     TTT\n");
+		rb += sprintf(page+rb, " 0x%08x   0x%08x   0x%08x   0x%08x"
+				"   0x%08x   0x%08x\n",
+			sess->cmdsn_window,
+			(sess->max_cmd_sn - sess->exp_cmd_sn) + 1,
+			sess->exp_cmd_sn, sess->max_cmd_sn,
+			sess->init_task_tag, sess->targ_xfer_tag);
+		rb += sprintf(page+rb, "----------------------[iSCSI"
+				" Connections]-------------------------\n");
+
+		spin_lock(&sess->conn_lock);
+		list_for_each_entry(conn, &sess->sess_conn_list, conn_list) {
+			rb += sprintf(page+rb, "CID: %hu  Connection"
+					" State: ", conn->cid);
+			switch (conn->conn_state) {
+			case TARG_CONN_STATE_FREE:
+				rb += sprintf(page+rb,
+					"TARG_CONN_STATE_FREE\n");
+				break;
+			case TARG_CONN_STATE_XPT_UP:
+				rb += sprintf(page+rb,
+					"TARG_CONN_STATE_XPT_UP\n");
+				break;
+			case TARG_CONN_STATE_IN_LOGIN:
+				rb += sprintf(page+rb,
+					"TARG_CONN_STATE_IN_LOGIN\n");
+				break;
+			case TARG_CONN_STATE_LOGGED_IN:
+				rb += sprintf(page+rb,
+					"TARG_CONN_STATE_LOGGED_IN\n");
+				break;
+			case TARG_CONN_STATE_IN_LOGOUT:
+				rb += sprintf(page+rb,
+					"TARG_CONN_STATE_IN_LOGOUT\n");
+				break;
+			case TARG_CONN_STATE_LOGOUT_REQUESTED:
+				rb += sprintf(page+rb,
+					"TARG_CONN_STATE_LOGOUT_REQUESTED\n");
+				break;
+			case TARG_CONN_STATE_CLEANUP_WAIT:
+				rb += sprintf(page+rb,
+					"TARG_CONN_STATE_CLEANUP_WAIT\n");
+				break;
+			default:
+				rb += sprintf(page+rb,
+					"ERROR: Unknown Connection State!\n");
+				break;
+			}
+
+			rb += sprintf(page+rb, "   Address %s %s", conn->login_ip,
+				(conn->network_transport == ISCSI_TCP) ?
+				"TCP" : "SCTP");
+			rb += sprintf(page+rb, "  StatSN: 0x%08x\n",
+				conn->stat_sn);
+		}
+		spin_unlock(&sess->conn_lock);
+	}
+	spin_unlock_bh(&se_nacl->nacl_sess_lock);
+
+	return rb;
+}
+
+TF_NACL_BASE_ATTR_RO(lio_target, info);
+
+static ssize_t lio_target_nacl_show_cmdsn_depth(
+	struct se_node_acl *se_nacl,
+	char *page)
+{
+	return sprintf(page, "%u\n", se_nacl->queue_depth);
+}
+
+static ssize_t lio_target_nacl_store_cmdsn_depth(
+	struct se_node_acl *se_nacl,
+	const char *page,
+	size_t count)
+{
+	struct se_portal_group *se_tpg = se_nacl->se_tpg;
+	struct iscsi_portal_group *tpg = container_of(se_tpg,
+			struct iscsi_portal_group, tpg_se_tpg);
+	struct config_item *acl_ci, *tpg_ci, *wwn_ci;
+	char *endptr;
+	u32 cmdsn_depth = 0;
+	int ret;
+
+	cmdsn_depth = simple_strtoul(page, &endptr, 0);
+	if (cmdsn_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
+		pr_err("Passed cmdsn_depth: %u exceeds"
+			" TA_DEFAULT_CMDSN_DEPTH_MAX: %u\n", cmdsn_depth,
+			TA_DEFAULT_CMDSN_DEPTH_MAX);
+		return -EINVAL;
+	}
+	acl_ci = &se_nacl->acl_group.cg_item;
+	if (!acl_ci) {
+		pr_err("Unable to locatel acl_ci\n");
+		return -EINVAL;
+	}
+	tpg_ci = &acl_ci->ci_parent->ci_group->cg_item;
+	if (!tpg_ci) {
+		pr_err("Unable to locate tpg_ci\n");
+		return -EINVAL;
+	}
+	wwn_ci = &tpg_ci->ci_group->cg_item;
+	if (!wwn_ci) {
+		pr_err("Unable to locate config_item wwn_ci\n");
+		return -EINVAL;
+	}
+
+	if (iscsit_get_tpg(tpg) < 0)
+		return -EINVAL;
+	/*
+	 * iscsit_tpg_set_initiator_node_queue_depth() assumes force=1
+	 */
+	ret = iscsit_tpg_set_initiator_node_queue_depth(tpg,
+				config_item_name(acl_ci), cmdsn_depth, 1);
+
+	pr_debug("LIO_Target_ConfigFS: %s/%s Set CmdSN Window: %u for"
+		"InitiatorName: %s\n", config_item_name(wwn_ci),
+		config_item_name(tpg_ci), cmdsn_depth,
+		config_item_name(acl_ci));
+
+	iscsit_put_tpg(tpg);
+	return (!ret) ? count : (ssize_t)ret;
+}
+
+TF_NACL_BASE_ATTR(lio_target, cmdsn_depth, S_IRUGO | S_IWUSR);
+
+static struct configfs_attribute *lio_target_initiator_attrs[] = {
+	&lio_target_nacl_info.attr,
+	&lio_target_nacl_cmdsn_depth.attr,
+	NULL,
+};
+
+static struct se_node_acl *lio_tpg_alloc_fabric_acl(
+	struct se_portal_group *se_tpg)
+{
+	struct iscsi_node_acl *acl;
+
+	acl = kzalloc(sizeof(struct iscsi_node_acl), GFP_KERNEL);
+	if (!acl) {
+		pr_err("Unable to allocate memory for struct iscsi_node_acl\n");
+		return NULL;
+	}
+
+	return &acl->se_node_acl;
+}
+
+static struct se_node_acl *lio_target_make_nodeacl(
+	struct se_portal_group *se_tpg,
+	struct config_group *group,
+	const char *name)
+{
+	struct config_group *stats_cg;
+	struct iscsi_node_acl *acl;
+	struct se_node_acl *se_nacl_new, *se_nacl;
+	struct iscsi_portal_group *tpg = container_of(se_tpg,
+			struct iscsi_portal_group, tpg_se_tpg);
+	u32 cmdsn_depth;
+
+	se_nacl_new = lio_tpg_alloc_fabric_acl(se_tpg);
+	if (!se_nacl_new)
+		return ERR_PTR(-ENOMEM);
+
+	acl = container_of(se_nacl_new, struct iscsi_node_acl,
+				se_node_acl);
+
+	cmdsn_depth = ISCSI_TPG_ATTRIB(tpg)->default_cmdsn_depth;
+	/*
+	 * se_nacl_new may be released by core_tpg_add_initiator_node_acl()
+	 * when converting a NdoeACL from demo mode -> explict
+	 */
+	se_nacl = core_tpg_add_initiator_node_acl(se_tpg, se_nacl_new,
+				name, cmdsn_depth);
+	if (IS_ERR(se_nacl))
+		return se_nacl;
+
+	stats_cg = &acl->se_node_acl.acl_fabric_stat_group;
+
+	stats_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+				GFP_KERNEL);
+	if (!stats_cg->default_groups) {
+		pr_err("Unable to allocate memory for"
+				" stats_cg->default_groups\n");
+		core_tpg_del_initiator_node_acl(se_tpg, se_nacl, 1);
+		kfree(acl);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	stats_cg->default_groups[0] = &NODE_STAT_GRPS(acl)->iscsi_sess_stats_group;
+	stats_cg->default_groups[1] = NULL;
+	config_group_init_type_name(&NODE_STAT_GRPS(acl)->iscsi_sess_stats_group,
+			"iscsi_sess_stats", &iscsi_stat_sess_cit);
+
+	return se_nacl;
+}
+
+static void lio_target_drop_nodeacl(
+	struct se_node_acl *se_nacl)
+{
+	struct se_portal_group *se_tpg = se_nacl->se_tpg;
+	struct iscsi_node_acl *acl = container_of(se_nacl,
+			struct iscsi_node_acl, se_node_acl);
+	struct config_item *df_item;
+	struct config_group *stats_cg;
+	int i;
+
+	stats_cg = &acl->se_node_acl.acl_fabric_stat_group;
+	for (i = 0; stats_cg->default_groups[i]; i++) {
+		df_item = &stats_cg->default_groups[i]->cg_item;
+		stats_cg->default_groups[i] = NULL;
+		config_item_put(df_item);
+	}
+	kfree(stats_cg->default_groups);
+
+	core_tpg_del_initiator_node_acl(se_tpg, se_nacl, 1);
+	kfree(acl);
+}
+
+/* End items for lio_target_acl_cit */
+
+/* Start items for lio_target_tpg_attrib_cit */
+
+#define DEF_TPG_ATTRIB(name)						\
+									\
+static ssize_t iscsi_tpg_attrib_show_##name(				\
+	struct se_portal_group *se_tpg,				\
+	char *page)							\
+{									\
+	struct iscsi_portal_group *tpg = container_of(se_tpg,		\
+			struct iscsi_portal_group, tpg_se_tpg);	\
+	ssize_t rb;							\
+									\
+	if (iscsit_get_tpg(tpg) < 0)					\
+		return -EINVAL;						\
+									\
+	rb = sprintf(page, "%u\n", ISCSI_TPG_ATTRIB(tpg)->name);	\
+	iscsit_put_tpg(tpg);						\
+	return rb;							\
+}									\
+									\
+static ssize_t iscsi_tpg_attrib_store_##name(				\
+	struct se_portal_group *se_tpg,				\
+	const char *page,						\
+	size_t count)							\
+{									\
+	struct iscsi_portal_group *tpg = container_of(se_tpg,		\
+			struct iscsi_portal_group, tpg_se_tpg);	\
+	char *endptr;							\
+	u32 val;							\
+	int ret;							\
+									\
+	if (iscsit_get_tpg(tpg) < 0)					\
+		return -EINVAL;						\
+									\
+	val = simple_strtoul(page, &endptr, 0);				\
+	ret = iscsit_ta_##name(tpg, val);				\
+	if (ret < 0)							\
+		goto out;						\
+									\
+	iscsit_put_tpg(tpg);						\
+	return count;							\
+out:									\
+	iscsit_put_tpg(tpg);						\
+	return ret;							\
+}
+
+#define TPG_ATTR(_name, _mode) TF_TPG_ATTRIB_ATTR(iscsi, _name, _mode);
+
+/*
+ * Define iscsi_tpg_attrib_s_authentication
+ */
+DEF_TPG_ATTRIB(authentication);
+TPG_ATTR(authentication, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_tpg_attrib_s_login_timeout
+ */
+DEF_TPG_ATTRIB(login_timeout);
+TPG_ATTR(login_timeout, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_tpg_attrib_s_netif_timeout
+ */
+DEF_TPG_ATTRIB(netif_timeout);
+TPG_ATTR(netif_timeout, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_tpg_attrib_s_generate_node_acls
+ */
+DEF_TPG_ATTRIB(generate_node_acls);
+TPG_ATTR(generate_node_acls, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_tpg_attrib_s_default_cmdsn_depth
+ */
+DEF_TPG_ATTRIB(default_cmdsn_depth);
+TPG_ATTR(default_cmdsn_depth, S_IRUGO | S_IWUSR);
+/*
+ Define iscsi_tpg_attrib_s_cache_dynamic_acls
+ */
+DEF_TPG_ATTRIB(cache_dynamic_acls);
+TPG_ATTR(cache_dynamic_acls, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_tpg_attrib_s_demo_mode_write_protect
+ */
+DEF_TPG_ATTRIB(demo_mode_write_protect);
+TPG_ATTR(demo_mode_write_protect, S_IRUGO | S_IWUSR);
+/*
+ * Define iscsi_tpg_attrib_s_prod_mode_write_protect
+ */
+DEF_TPG_ATTRIB(prod_mode_write_protect);
+TPG_ATTR(prod_mode_write_protect, S_IRUGO | S_IWUSR);
+
+static struct configfs_attribute *lio_target_tpg_attrib_attrs[] = {
+	&iscsi_tpg_attrib_authentication.attr,
+	&iscsi_tpg_attrib_login_timeout.attr,
+	&iscsi_tpg_attrib_netif_timeout.attr,
+	&iscsi_tpg_attrib_generate_node_acls.attr,
+	&iscsi_tpg_attrib_default_cmdsn_depth.attr,
+	&iscsi_tpg_attrib_cache_dynamic_acls.attr,
+	&iscsi_tpg_attrib_demo_mode_write_protect.attr,
+	&iscsi_tpg_attrib_prod_mode_write_protect.attr,
+	NULL,
+};
+
+/* End items for lio_target_tpg_attrib_cit */
+
+/* Start items for lio_target_tpg_param_cit */
+
+#define DEF_TPG_PARAM(name)						\
+static ssize_t iscsi_tpg_param_show_##name(				\
+	struct se_portal_group *se_tpg,					\
+	char *page)							\
+{									\
+	struct iscsi_portal_group *tpg = container_of(se_tpg,		\
+			struct iscsi_portal_group, tpg_se_tpg);		\
+	struct iscsi_param *param;					\
+	ssize_t rb;							\
+									\
+	if (iscsit_get_tpg(tpg) < 0)					\
+		return -EINVAL;						\
+									\
+	param = iscsi_find_param_from_key(__stringify(name),		\
+				tpg->param_list);			\
+	if (!param) {							\
+		iscsit_put_tpg(tpg);					\
+		return -EINVAL;						\
+	}								\
+	rb = snprintf(page, PAGE_SIZE, "%s\n", param->value);		\
+									\
+	iscsit_put_tpg(tpg);						\
+	return rb;							\
+}									\
+static ssize_t iscsi_tpg_param_store_##name(				\
+	struct se_portal_group *se_tpg,				\
+	const char *page,						\
+	size_t count)							\
+{									\
+	struct iscsi_portal_group *tpg = container_of(se_tpg,		\
+			struct iscsi_portal_group, tpg_se_tpg);		\
+	char *buf;							\
+	int ret;							\
+									\
+	buf = kzalloc(PAGE_SIZE, GFP_KERNEL);				\
+	if (!buf)							\
+		return -ENOMEM;						\
+	snprintf(buf, PAGE_SIZE, "%s=%s", __stringify(name), page);	\
+	buf[strlen(buf)-1] = '\0'; /* Kill newline */			\
+									\
+	if (iscsit_get_tpg(tpg) < 0) {					\
+		kfree(buf);						\
+		return -EINVAL;						\
+	}								\
+									\
+	ret = iscsi_change_param_value(buf, tpg->param_list, 1);	\
+	if (ret < 0)							\
+		goto out;						\
+									\
+	kfree(buf);							\
+	iscsit_put_tpg(tpg);						\
+	return count;							\
+out:									\
+	kfree(buf);							\
+	iscsit_put_tpg(tpg);						\
+	return -EINVAL;						\
+}
+
+#define TPG_PARAM_ATTR(_name, _mode) TF_TPG_PARAM_ATTR(iscsi, _name, _mode);
+
+DEF_TPG_PARAM(AuthMethod);
+TPG_PARAM_ATTR(AuthMethod, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(HeaderDigest);
+TPG_PARAM_ATTR(HeaderDigest, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(DataDigest);
+TPG_PARAM_ATTR(DataDigest, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(MaxConnections);
+TPG_PARAM_ATTR(MaxConnections, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(TargetAlias);
+TPG_PARAM_ATTR(TargetAlias, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(InitialR2T);
+TPG_PARAM_ATTR(InitialR2T, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(ImmediateData);
+TPG_PARAM_ATTR(ImmediateData, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(MaxRecvDataSegmentLength);
+TPG_PARAM_ATTR(MaxRecvDataSegmentLength, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(MaxBurstLength);
+TPG_PARAM_ATTR(MaxBurstLength, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(FirstBurstLength);
+TPG_PARAM_ATTR(FirstBurstLength, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(DefaultTime2Wait);
+TPG_PARAM_ATTR(DefaultTime2Wait, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(DefaultTime2Retain);
+TPG_PARAM_ATTR(DefaultTime2Retain, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(MaxOutstandingR2T);
+TPG_PARAM_ATTR(MaxOutstandingR2T, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(DataPDUInOrder);
+TPG_PARAM_ATTR(DataPDUInOrder, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(DataSequenceInOrder);
+TPG_PARAM_ATTR(DataSequenceInOrder, S_IRUGO | S_IWUSR);
+
+DEF_TPG_PARAM(ErrorRecoveryLevel);
+TPG_PARAM_ATTR(ErrorRecoveryLevel, S_IRUGO | S_IWUSR);
+
+DEF_TP